As he walks under some scaffolding, a workman above drops a stanley knife and it slices Paddy's ear clean off.
As Paddy screams out in pain, the whole site workforce come running, looking for the lost ear.
After a few seconds a bloke finds an ear in a pile of rubble and shouts "Is this it!?"
Paddy looks up and shouts back
"no, mine had a pencil behind it...!"